PatIndex Problem

I've been recently looking for a way to see if a keyword is used within a given text in the database and have been using PatIndex to check if that word exists... problem is, when I search for PatIndex('%car%', @SearchText), if the searchtext has the word cartridge, it also picks it up. I have tried using two spaces, one at the begining and one at the end... but that causes car's to be rejected...

Load balancing is the method of dividing the total amount of work performed by one computer between two or more computers. Its aim is to get more work done in the same amount of time, ensuring that all the users get served faster.